Anchoring device



Dec. 23, 1941. A. E. MULLEN 2,266,892

ANCHORING DEVICE Filed March 1l, 1940 n: e: xl

F|G.5. l VENTR -ARTHUR ULLE A FI"VRNEK Patented Dec. 23, 1941 ANCHORINGDEVICE Arthur E. Mullen, st. Louis, Mo., assigner to Donald A. Deems,St. Louis County, Mo.

Application March 11, 1940, Serial No. 323,485

7 Claims.

This invention relates in general to certain new and useful improvementsin anchoring devices and more particularly to anchor bolts adapted forsecurement in brick walls and other types of masonry structures. i

In the erection of telephone lines, power lines, the hanging ofadvertising signs and awnings, as well as in a wide variety of detaileduses, it is common practice at the present time to drill a suitableaperture in the wall to which attachment is being made and insert a leadferrule or socalled expansion shell. The shell is rsually provided withsome form of internally threaded nut having a frusto-conical orwedge-forming outer face for expanding the shell, a bolt being threadedinto the nut for engaging the hanger or other means, which is in turnemployed for directly supporting the telephone line, power line, sign,awning, or the like.

The expansion shell, however, and its associated bolt, are somewhatexpensive to manufacture and, by reason of the necessity for drilling areceiving aperture, become extremely expensive to install. In additionto this, the expansion shell. upon being expanded, exerts a considerablecrushing force against the side walls of the receiving aperture andfrequently, where the brick or concrete in which the shell is beinginserted is weathered, the shell will actually crush the masonrystructure to such an ext-ent that it will be impossible to seat theshell properly. Under such circumstances, the shell must be discardedand an over-size shell inserted in the aperture or the shell-receivingaperture must be plugged up and a second aperture drilled at a differentlocation. Once installed, the shells assume a substantially fixeddiameter and when subjected to vibration frequently become looosened andpull out. Finally, the shells cannot readily be removed from a wall orother masonry structure and cannot be reused.

In ord'er to avoid this expense and labor cost. it has also been acommon alternative practice to chisel or dig out a substantialsection ofmortar from a selected seam between two bricks or tiles and drive anover-size block of wood into the crevice thus formed and then insert aconventional lag-screw, nail, or other suitable attachment means intothe wood block. This method is considerably cheaper and lesstime-consuming than the use of expansion shells, but is even lesssatisfactory because the wood block invariably shrinks and deterioratesas a result of exposure to the elements, very quickly becoming looosenedand pulling out.

My invention hence has for its primary objects the provision of ananchor bolt which is simple and inexpensive, which may be readilyinstalled in the seams between brick-work and other masonry structuresin a very simple, con 'enient, and speedy manner, which is extremelysecure against pull-outs, and /ich at the same time may be removed withc/mparative ease and simplicity when its use ha terminated.

And with the above and other objects in view, my invention resides inthe novel features of form, construction, arrangement, and combinationof parts presently described and pointed out in the claims.

In the accompanying drawing- Figure 1 is a perspective view of an anchorbolt constructed in accordance with and embodying my present invention,illustrating the anchor bolt in position adjacent to a brick wall forinsertion therein;

Figure 2 is a front elevational view of the anchor bolt;

Figure 3 is a longitudinal sectional view of the anchor bolt inoperative position in the brick wall;

Figures 4 and 5 are longitudinal sectional views of modified forms ofanchor bolts constructed in accordance with my present invention:

Figure 6 is an exploded view of' the head portion of the bolt,illustrating one preferred manner of construction; and

Figures 7 and 8 are end and side elevational views, respectively, of thebolt head, showing in more detail the flaring cutting edges thereof.

Referring now in more detail and by reference characters to the drawing,which illustrates practical embodiments oi' my present invention, Adesignates an anchor bolt includingv an elongated preferably cylindricalshank I provided at its forward or entrant end with a preferablydrop-forged arrow-like or triangular head 2 hav- .ing a forwardlypresented point 3, somewhat beveled leading edges 4, and bluntrearwardly presented abutment faces 5 disposed preferably in a plane atright angles to the longitudinal axis of the shank. In this connectionit may be pointed out that the shank may, if desired, be axiallyslotted, as at s, and the head member 2 may be separately formed andsecured therein by welding, riveting, or any other suitable method, asshown in Figure 6. By reference to Figure 3 and to the enlarged detailview, Figure 7, it will be seen that the leading edges 4 and the forwardend of the shank merge in the provision of four forwardly presentedcutting edges arranged respectively at 90 to each other. At its oth'erend, the shank l is ground oil' or otherwise formed to provide a.four-sided extension or tail-portion 6 and, inwardly of the tail-portion6, the shank is finally threaded in the provision of a nut-receivingportion 1, all as best seen in Figures 1 and 3 and for purposespresently more fully appearing.

Loosely mounted upon the threaded portion 1 of the shank I is aconventional washer 8 and a hanger Il having an integrally formedradially outwardly extending arm I bent inwardly at its outer extremityin the provision of an attachment hook II, and outwardly of the washer8, the threaded portion 1 of the shank I is finally provided with aconventional nut I2.

In use, the anchor bolt A is presented toward a brick wall B, forinstance, with the point 3 approximately midway of a selected mortarseam b, with the head 2 disposed in the same general direction as theseam b, that is to say, if the seam b is a horizontal seam, the head 2should be substantially horizontal, and if the seam is a vertical seam,the head 2 should be vertical. If, as may infrequently happen, the seamshould extend in some other general direction than vertical orhorizontal, the head member 2 should be disposed more or less in thatgeneral direction or plane. It will, of course, be evident that theshank I should preferably be held so that its longitudinal axis isapproximately at right angles to the seam b. Thereupon, the workman maystrike the end face of the extension or tail-member 6 a suicient numberof blows with a hammer or suitable tool to drive the anchor bolt intothe mortar or cement which forms the seam b until the pointed head 2 hasbeen driven beyond the inner face of the bricks of the wall B.Thereupon, the extension or tail-member 6 is gripped with a wrench orpliers and the bolt A turned through an angle of approximately 90".Finally, the nut I2 is threaded forwardly on the threaded portion 1,forcing the washer 8 and hanger member 9 against the outer face of theybrick wall B and pulling the bolt A rearwardly until the abutment facesB of the head 2 are brought into tight abutting engagement with theinner face of the brick wall B on either side of the seam b, as bestseen in Figure 3. The nut I2 is then drawn down tightly and the anchorbolt thus securely and permanently seated in the wall B, and aconventional cable clamp C and cable c hooked or looped over the hook IIof the hanger 9.

If desired, an insulator-supporting bracket I 3.

may be substituted for the hanger 9, as shown in Figure 4. In such case,however, it has been found preferable to provide the threaded portion 1of the shank with a relatively thin auxiliary nut or threaded washer I4.The bolt A is then driven into the brick wall with the washer 8, the nutI2, and the auxiliary washer I4 in place. Upon completion of the drivingoperation, the bolt A is turned through an angle of 90 and the auxiliarywasher Il threaded up into abutmentl ceiving the washer B' and nut I2'.At its outer extremity, the barrel portion I5 is integrally providedwith a downwardly depending forged hook I8 and an axially projectingimpact head I1. The washer 8' and nut I2' are then placed upon thethreaded portion 1' and thereupon the head member 2 is forged orotherwise formed. The anchor bolt A may be installed in a brick ormasonry wall in substantially the same manner as previously described inconnection with the anchor bolt A, all as best seen in Figure 5.

It will be evident that by my invention I have provided an anchor boltwhich may be very quickly and simply installed with a minimum of laborcost. In addition, the anchor bolt, when installed, will be securely andpositively held in place and will not easily become loosened or pull outduring actual use. Furthermore, when it becomes desirable or necessaryto remove the power line, advertising sign, or other object supported bythe anchor bolt, the latter may be very simply and easily removed fromthe wall and in a great many cases may be used over again, the vacantspace left by such removal being readily plugged up with new mortar,putty, or other suitable calking material.

It should be understood that changes and modifications in the form,construction, arrangement, and combination of the several parts of theanchoring device may be made and substituted for those herein shown anddescribed without departing from the nature and principle of myinvention.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. An anchor bolt for insertion into the seam of a masonry structureincluding an elongated shank provided at its one end with a flatarrowlike pointed head substantially smaller in thickness than the shankand having parallel planar faces, said head being adapted to retentivelyengage the inner face of the wall on either side of the seam uponrotation of the shank through an angle of 90,.said head being beveledalong its forwardly presented oblique margins in the provision ofsharpened edges, said shank at its other end being threadedly providedwith an attachment nut for engagement with the outer face of the wall.

2. An anchor bolt for insertion into the seam of a masonry structure,being provided at its one end with a at laterally projecting headsubstantially smaller in thickness than the width of A the seam andhaving parallel planar faces, said head being adapted to retentivelyengage the inner face of the wall on either side of the seam uponrotation of the yshank through an angle of said shank at its other endbeing threadedly provided with an attachment nut for engagement with theouter face of the wall.

-3. An anchor bolt for insertion into the seam of a masonry structure,being provided at its one end with a at arrow-like pointed headsubstantially smaller in thickness than the width of the seam and havingparallel planar faces, said head being adapted to retentively engage theinner face of the wall on either side of the seam upon rotation of theshank through an angle of 90, said shank at its other end being providedwith a diametrally enlarged threaded barrel, and a hook member formedintegrally with and extending outwardly from the barrel.

4. An anchor bolt including an elongated shank tapered at one end andprovided at such tapered end with a diametral slot extending axiallyinto the shank beyond the taper, and a triangularly shaped metallicelement xed within the slot having its apex substantially coincidentwith the outer extremity of the tapered end in the formation of a pointand at its base extending symmetrically on opposite sides of the shankin the provision of abutment wings substantially thinner than the shank.

5. An anchor bolt for insertion into the seam of a masonry structureincluding an elongated shank provided at its one end with a at arrowlikepointed head substantially smaller in thickness than the shank and beingadapted to retentively engage the inner face of the Wall on either sideof the seam upon rotation of the shank through an angle of 90, said headbeing beveled along its forwardly presented oblique margins in theprovision of sharpened edges, said shank being tapered adjacent the headand of a masonry structure including an elongated shank having atriangularly pointed end including a pair of diametrally extending atblades having forwardly presented angular cutting edges merging with theshank in the formation of a tip having four rearwardly flaring cuttingedges disposed at 90 to each other.

ARTHUR. E. MULLEN.

